1 What: /sys/devices/.../lpss_ltr/
3 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
5 The /sys/devices/.../lpss_ltr/ directory is only present for
6 devices included into the Intel Lynxpoint Low Power Subsystem
7 (LPSS). If present, it contains attributes containing the LTR
8 mode and the values of LTR registers of the device.
10 What: /sys/devices/.../lpss_ltr/ltr_mode
12 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
14 The /sys/devices/.../lpss_ltr/ltr_mode attribute contains an
15 integer number (0 or 1) indicating whether or not the devices'
16 LTR functionality is working in the software mode (1).
18 This attribute is read-only. If the device's runtime PM status
19 is not "active", attempts to read from this attribute cause
20 -EAGAIN to be returned.
22 What: /sys/devices/.../lpss_ltr/auto_ltr
24 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
26 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
27 current value of the device's AUTO_LTR register (raw)
28 represented as an 8-digit hexadecimal number.
30 This attribute is read-only. If the device's runtime PM status
31 is not "active", attempts to read from this attribute cause
32 -EAGAIN to be returned.
34 What: /sys/devices/.../lpss_ltr/sw_ltr
36 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
38 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
39 current value of the device's SW_LTR register (raw) represented
40 as an 8-digit hexadecimal number.
42 This attribute is read-only. If the device's runtime PM status
43 is not "active", attempts to read from this attribute cause
44 -EAGAIN to be returned.